Defining the glass composition limits for the CaO-Al2O3-SiO2 ternary system

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Vitrification is being investigated as an alternative wasteform for Department of Energy low-level mixed wastes. Since these wastes often contain significant amounts of calcium, the CaO-Al{sub 2}O{sub 3}-SiO{sub 2} ternary system may be used when trying to determine suitable glass compositions. The objective of this research was to determine a leach-resistant glass forming region in the CaO-Al{sub 2}O{sub 3}-SiO{sub 2} system. Several glasses were fabricated and characterized for chemical composition and durability to ensure that the glass-forming region was completely covered. A total of twenty-nine compositions were studied, with eighteen producing glass. Eleven of the glasses passed all the durability ... continued below

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14 p.

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Cicero, C.A.; Andrews, M.K. & Bickford, D.F. November 1, 1995.

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Vitrification is being investigated as an alternative wasteform for Department of Energy low-level mixed wastes. Since these wastes often contain significant amounts of calcium, the CaO-Al{sub 2}O{sub 3}-SiO{sub 2} ternary system may be used when trying to determine suitable glass compositions. The objective of this research was to determine a leach-resistant glass forming region in the CaO-Al{sub 2}O{sub 3}-SiO{sub 2} system. Several glasses were fabricated and characterized for chemical composition and durability to ensure that the glass-forming region was completely covered. A total of twenty-nine compositions were studied, with eighteen producing glass. Eleven of the glasses passed all the durability tests performed and could be characterized as durable and leach resistant. Five additional glasses passed the Product Consistency Test (PCT), but did not meet the most restrictive limits for the Toxicity Characteristic Leaching Procedure (TCLP). However, these glasses were also classified as acceptable because of the conservative sample size used for the test. The other two glasses performed well on the PCT, but had excessive releases on the TCLP. When plotted on the CaO-Al{sub 2}O{sub 3}-SiO{sub 2} ternary, these compositions provided a good sized glass forming region, which will be utilized for further low-level mixed waste studies.

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14 p.

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INIS; OSTI as DE96001858

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  • 3. American Society for Mechanical Engineers (ASME) biennial mixed waste symposium, Baltimore, MD (United States), 7-11 Aug 1995

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  • Other: DE96001858
  • Report No.: WSRC-MS--95-0185
  • Report No.: CONF-950877--20
  • Grant Number: AC09-89SR18035
  • DOI: 10.2172/113806 | External Link
  • Office of Scientific & Technical Information Report Number: 120899
  • Archival Resource Key: ark:/67531/metadc624336

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  • November 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • June 24, 2016, 2:08 p.m.

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Cicero, C.A.; Andrews, M.K. & Bickford, D.F. Defining the glass composition limits for the CaO-Al2O3-SiO2 ternary system, article, November 1, 1995; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc624336/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.